Hermetic window assembly with pressure-equalization system
CA 1284745 C · Owner: Ricks, Charles M. · Inventors: Ricks, Charles M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double-glazed hermetically-sealed window, assembly having a manually-actuated pressure-equalization system in the form of a spring-biased pushbutton valve installed in one of the glass panes. When actuated by pushbutton action, the valve opens to provide an air passageway coupling the interior airspace between the two panes to the ambient air, thereby equalizing any air pressure differential therebetween.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.